CN214064579U - Closed safe recovery system of storage tank waste gas of coke-oven plant - Google Patents
Closed safe recovery system of storage tank waste gas of coke-oven plant Download PDFInfo
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- CN214064579U CN214064579U CN202023261186.6U CN202023261186U CN214064579U CN 214064579 U CN214064579 U CN 214064579U CN 202023261186 U CN202023261186 U CN 202023261186U CN 214064579 U CN214064579 U CN 214064579U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
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Abstract
The utility model relates to a closed safe recovery system of coking plant storage tank waste gas belongs to the exhaust-gas treatment field. The system is connected to the front end of a cooling blower of a coking plant and comprises a pressure stabilizing system, a cooling buffer system and a nitrogen pipeline which are connected with each other, wherein the pressure stabilizing system comprises a plurality of closed storage tanks, and breather valves and storage tank instruments which are arranged on the closed storage tanks; the cooling buffer system comprises a cooling buffer tank and a plurality of pipelines communicated with the cooling buffer tank, wherein the pipelines comprise a washing oil pipeline, a cold water inlet pipeline, a cold water outlet pipeline, a liquid discharge pipeline and an exhaust pipeline. The system can realize the closed recovery of the storage tank waste gas, ensure the oxygen content of the waste gas in a safe range, and effectively treat the waste gas of a coking plant.
Description
Technical Field
The utility model relates to a waste gas treatment field particularly, relates to an airtight safe recovery system of coking plant storage tank waste gas.
Background
A large amount of organic waste gas is generated in a coal gasification production section of a coking plant, wherein most of the organic waste gas belongs to storage tank waste gas and mainly exists in a circulating ammonia water tank, a residual ammonia water tank and a tar tank of a drum cooling section; crude benzene storage tank, poor oil washing groove, new oil washing groove, water seal groove, reflux column, gas-liquid separator, control separation jar in crude benzene workshop section. The storage tank waste gas belongs to the waste gas of a closed space, and has strict requirements on the oxygen content in the waste gas.
The existing treatment method for the storage tank waste gas in the coke-oven plant is weak, most of the treatment methods adopt a washing mode, but the washing effect is difficult to guarantee, and the current strict environmental emission standard cannot be completely met. The conventional storage tank waste gas negative pressure recovery processing method of the coking plant is characterized in that storage tank waste gas is connected to a blowing fan, oxygen can be sucked from the atmosphere in the storage tank in the size breathing process, the oxygen content of the waste gas is possibly overproof in the negative pressure recovery process, the requirement standard of subsequent equipment for the oxygen content is strict, most of the required oxygen content is below 1%, and accidents of equipment such as an electric tar precipitator and the like occur due to the fact that the oxygen content is overproof. Most of the existing negative pressure recovery systems of coke plants are limited by the problem of oxygen content, and cannot achieve real safety and reliability.
SUMMERY OF THE UTILITY MODEL
In particular, the utility model provides a solve above-mentioned problem the utility model provides a closed safe recovery system of coking plant storage tank waste gas adopts the oxygen content of multiple safety guarantee measure guarantee storage tank waste gas at the index range, can not cause follow-up equipment to take place the incident because of oxygen content's in the waste gas problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a closed safe recovery system for storage tank waste gas of a coking plant comprises a pressure stabilizing system, a cooling buffer system and a nitrogen pipeline which are connected with each other, wherein the pressure stabilizing system comprises a closed storage tank, a breather valve and a storage tank instrument which are arranged on the closed storage tank; the cooling buffer system comprises a cooling buffer tank, and a wash oil pipeline, a cold water inlet pipeline, a cold water outlet pipeline, a liquid discharge pipeline and an exhaust pipeline which are communicated with the cooling buffer tank. Nitrogen gas pipeline and coke-oven plant's nitrogen gas house steward are connected, and nitrogen gas passes through the nitrogen gas pipeline and gets into this system, and this system connection is at coke-oven plant's air-cooled blower front end.
Preferably, the number of the closed storage tanks can be adjusted according to the specific waste gas amount of the coke-oven plant;
more preferably, the number of closed tanks is 3.
Preferably, the storage tank instrument is a pressure sensor capable of displaying the pressure in the closed storage tank;
the nitrogen pipeline respectively with airtight storage tank cooling buffer tank with exhaust duct intercommunication, the nitrogen pipeline with be provided with the nitrogen valve on the pipeline that airtight storage tank links to each other, the nitrogen pipeline with be equipped with the valve of adding nitrogen on the pipeline that the cooling buffer tank links to each other, the nitrogen pipeline with be equipped with on the pipeline that exhaust duct links to each other and fill the nitrogen valve.
Preferably, the nitrogen valve is an automatic pressure control nitrogen supplementing valve;
preferably, the nitrogen adding valve is an automatic pressure control nitrogen supplementing valve.
The airtight storage tank with the cooling buffer tank passes through the pipeline of giving vent to anger and links to each other, be equipped with out the gas valve on the pipeline of giving vent to anger and sweep the valve with giving vent to anger, wherein go out the gas valve with the storage tank instrument is chain, the storage tank instrument can send signal control the switching of gas valve.
And a cooling water coil is arranged in the cooling buffer tank, the cooling water coil is respectively connected with the cold water inlet pipeline and the cold water outlet pipeline, and cooling water enters the cooling buffer tank through the cold water inlet pipe and is discharged from the cooling buffer tank through the cold water outlet pipe.
And the top of the cooling buffer tank is provided with a buffer tank instrument, a discharge valve and a liquid level instrument.
Preferably, the buffer tank instrument is a pressure sensor, and the relief valve is a safety valve;
more preferably, the level gauge is a level sensor.
And a liquid discharge valve is arranged on the liquid discharge pipeline, and the liquid level instrument is interlocked with the liquid discharge valve.
The exhaust pipeline is provided with an exhaust valve, an exhaust instrument, an exhaust detection valve, an oxygen content detector and an exhaust purging valve;
preferably, the exhaust valve is an automatic pressure regulating valve, the exhaust instrument is a pressure sensor, and the opening of the exhaust valve can be automatically regulated according to the pressure set by the exhaust instrument.
Preferably, the exhaust detection valve is a quick cut-off valve;
more preferably, the exhaust gas detection valve is a ball valve.
The oil washing pipeline is provided with an oil washing valve;
the washing oil pipeline is connected with a lean washing oil pipeline of a coking plant, and washing oil from the crude device enters the cooling buffer tank through the washing oil pipeline for washing;
preferably, a heating device is arranged on the washing oil pipeline, so that the washing oil can be heated, and the washing can be better carried out.
And a cold water inlet valve is arranged on the cold water inlet pipeline, and a cold water outlet valve is arranged on the cold water outlet pipeline.
The utility model has the advantages that the system is in a closed state, which can ensure the storage tank waste gas to be recovered in a closed environment without polluting the atmosphere; the pressure sensor and the automatic pressure regulating valve are arranged, so that the pressure of the system can be automatically regulated, and the work of personnel is reduced; multiple nitrogen supplement measures are arranged on the closed storage tank, the cooling buffer tank and the exhaust pipeline, so that the oxygen content in the waste gas of the storage tank can be effectively ensured to be within a safe range; the cooling and oil washing device can effectively prevent the pipelines from being blocked due to crystallization of naphthalene and the like in waste gas, and greatly reduces daily maintenance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a closed and safe recovery system for the storage tank waste gas of a coke-oven plant in embodiment 1.
In the figure: 1-nitrogen line; 2a, 2b, 2 c-nitrogen valves; 3a, 3b, 3 c-sealed storage tank; 4a, 4b, 4 c-tank meter; 5a, 5b, 5 c-an outlet duct; 6a, 6b, 6 c-gas outlet valve; 7-cooling the buffer tank; 8-an exhaust duct; 9-a relief valve; 10-buffer tank meter; 11-an oxygen content detector; 12-an exhaust meter; 13-an exhaust valve; 14-an exhaust detection valve; 15-exhaust purge valve; 16-cooling water coil pipe; 17-a level gauge; 18-a cold water inlet pipeline; 19-a cold water outlet pipeline; 20-a drainage pipeline; 21-drain valve; 22-cold water inlet valve; 23a, 23b, 23 c-outlet purge valve; 24-a nitrogen addition valve; 25-a nitrogen charging valve; 26a, 26b, 26 c-breathing valves; 27-a wash oil conduit; 28-wash oil valve; 29-cold water outlet valve.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and in combination with the embodiments of the present invention, it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The closed safe recovery system for the storage tank waste gas of the coking plant comprises a pressure stabilizing system and a cooling buffer system which are connected, and further comprises a nitrogen pipeline 1 which is communicated with the pressure stabilizing system and the cooling buffer system respectively, wherein the nitrogen pipeline 1 is connected with a nitrogen header pipe of the coking plant, nitrogen enters the system through the nitrogen pipeline 1, and the system is connected to the front end of an air cooler of the coking plant.
The pressure stabilizing system comprises 3 closed storage tanks 3a, 3b and 3c which are connected in parallel, breather valves 26a, 26b and 26c which are respectively arranged on the closed storage tanks 3a, 3b and 3c, and storage tank instruments 4a, 4b and 4c, wherein the storage tank instruments 4a, 4b and 4c in the embodiment are pressure sensors which can display the pressure in the closed storage tank 3;
the cooling buffer system comprises a cooling buffer tank 7 and a plurality of pipelines communicated with the cooling buffer tank 7, the pipelines comprise a washing oil pipeline 27, a cold water inlet pipeline 18, a cold water outlet pipeline 19, a liquid discharge pipeline 20 and an exhaust pipeline 8, and an outlet of the exhaust pipeline 8 is connected with a blowing air cooler.
The nitrogen pipeline 1 is respectively communicated with the closed storage tanks 3a, 3b and 3c, the cooling buffer tank 7 and the exhaust pipeline 8, the pipelines of the nitrogen pipeline 1 connected with the closed storage tanks 3a, 3b and 3c are respectively provided with nitrogen valves 2a, 2b and 2c, the pipeline of the nitrogen pipeline 1 connected with the cooling buffer tank 7 is provided with a nitrogen adding valve 24, the pipeline of the nitrogen pipeline 1 connected with the exhaust pipeline 8 is provided with a nitrogen charging valve 25, in the embodiment, the nitrogen valves 2a, 2b and 2c are automatic pressure control nitrogen supplementing valves, the pressure can be set to 300Pa according to the automatic pressure adjusting switches in the closed storage tanks 3a, 3b and 3c, and when the pressure in the closed storage tanks 3a, 3b and 3c is lower than 300Pa, the nitrogen valves 2a, 2b and 2c are automatically opened to inflate the closed storage tanks 3a, 3b and 3c to 300 Pa;
the closed storage tanks 3a, 3b and 3c are respectively connected with the cooling buffer tank 7 through gas outlet pipelines 5a, 5b and 5c, gas outlet valves 6a, 6b and 6c and gas outlet purge valves 23a, 23b and 23c are respectively arranged on the gas outlet pipelines 5a, 5b and 5c, the gas outlet valves 6a, 6b and 6c are respectively interlocked with the storage tank instruments 4a, 4b and 4c, the pressure of the storage tank instruments 4a, 4b and 4c is set to be 500Pa, when the pressure of the closed storage tanks 3a, 3b and 3c is increased due to feeding, and exceeds 500Pa, the gas outlet valves 6a, 6b and 6c are controlled to be opened through the storage tank instruments 4a, 4b and 4c, so that waste gas in the closed storage tanks 3a, 3b and 3c is discharged;
the pressure in the closed storage tanks 3a, 3b and 3c is maintained through the automatic adjustment of the nitrogen valves 2a, 2b and 2c, the storage tank instruments 4a, 4b and 4c and the air outlet valves 6a, 6b and 6c, and the oxygen content exceeding standard caused by air suction in the closed storage tanks 3a, 3b and 3c can be ensured through nitrogen supplement, which is the first-stage oxygen content control.
The breather valves 26a, 26b, 26c are provided in the closed tanks 3a, 3b, 3c, respectively, and the exhaust pressures of the breather valves 26a, 26b, 26c are set to 800-.
A cooling water coil 16 is arranged in the cooling buffer tank 7, the cooling water coil 16 is respectively connected with a cold water inlet pipeline 18 and a cold water outlet pipeline 19, a cold water inlet valve 22 and a cold water outlet valve 29 are respectively arranged on the cold water inlet pipeline 18 and the cold water outlet pipeline 19, cooling water enters the cooling buffer tank 7 through the cold water inlet pipeline 18, partial vapor and naphthalene in waste gas are cooled down, the naphthalene is prevented from blocking subsequent pipelines, and the circulated cooling water is discharged out of the cooling buffer tank 7 through the cold water outlet pipeline 19.
The wash oil pipeline 27 is provided with a wash oil valve 28, a large amount of naphthalene crystals can be crystallized on the tank wall after the cooling buffer tank 7 runs for a long time, and the wash oil valve 28 is opened, so that the wash oil from the crude benzene device enters the cooling buffer tank 7 through the wash oil pipeline 27 to be washed, and the naphthalene is dissolved.
The top of the cooling buffer tank 7 is provided with a buffer tank instrument 10, a relief valve 9 and a liquid level instrument 17, in the embodiment, the buffer tank instrument 10 is a pressure sensor and is used for monitoring pressure change in the cooling buffer tank 7, the relief valve 9 is a safety valve, and emergency relief can be performed through the relief valve 9 if the pressure of the cooling buffer tank 7 rises abnormally; if negative pressure is caused by condensation in the cooling buffer tank 7, the nitrogen adding valve 24 can be opened, nitrogen is supplemented in time through the nitrogen pipeline 1, and meanwhile, the oxygen content in the gas is ensured to be in an index range. This is a second level of oxygen control.
Be equipped with drain valve 21 on drain pipe 20, drain valve 21 is interlocked with level gauge 17, and in this embodiment, level gauge 17 is level sensor, and the liquid level height in the control cooling buffer tank 7 can open drain valve 21 automatically and discharge wash oil from drain pipe 20 when the liquid level reaches certain numerical value.
The exhaust pipe 8 is provided with an exhaust valve 13 and an exhaust instrument 12, in this embodiment, the exhaust valve 13 is an automatic pressure regulating valve, the exhaust instrument 12 is a pressure sensor, and the exhaust valve 13 automatically regulates the opening according to the pressure set by the exhaust instrument 12 to control the gas flow in the exhaust pipe 8.
The exhaust pipeline 8 is further provided with an exhaust detection valve 14 and an oxygen content detector 11, in this embodiment, the exhaust detection valve 14 is a ball valve, which can rapidly cut off the gas flow in the exhaust pipeline 8, the oxygen content detector 11 is used for detecting the oxygen content in the exhaust gas discharged from the exhaust pipeline 8, and when the oxygen content exceeds a set value, the nitrogen charging valve 25 on the nitrogen pipeline 1 is opened to charge nitrogen gas to adjust the oxygen content. When the nitrogen charging regulation fails and the oxygen content continues to rise to exceed the safe value, the exhaust detection valve 14 is directly cut off to prevent the high-oxygen-content waste gas from entering a subsequent device, which is the third-level oxygen content control.
The outlet pipelines 5a, 5b and 5c and the exhaust pipeline 8 are respectively provided with outlet purge valves 23a, 23b and 23c and an exhaust purge valve 15 for purging naphthalene in the exhaust gas. After the exhaust detection valve 14 is broken when the oxygen content exceeds the standard, the exhaust purging valves 23a, 23b and 23c and the exhaust purging valve 15 adopt nitrogen replacement purging to replace waste gas with high oxygen content in the system, and the system safety is ensured.
Claims (10)
1. The closed safe recovery system for the storage tank waste gas of the coking plant is characterized in that the system is connected with an external air cooling blower and comprises a pressure stabilizing system, a cooling buffer system and a nitrogen pipeline which are connected with each other; the pressure stabilizing system comprises a closed storage tank, a breather valve and a storage tank instrument, wherein the breather valve and the storage tank instrument are arranged on the closed storage tank; the cooling buffer system comprises a cooling buffer tank, and a wash oil pipeline, a cold water inlet pipeline, a cold water outlet pipeline, a liquid discharge pipeline and an exhaust pipeline which are communicated with the cooling buffer tank.
2. The closed safe storage tank waste gas recovery system of a coking plant as claimed in claim 1, wherein the nitrogen pipeline is respectively communicated with the closed storage tank, the cooling buffer tank and the exhaust pipeline, a nitrogen valve is arranged on the pipeline connecting the nitrogen pipeline and the closed storage tank, a nitrogen adding valve is arranged on the pipeline connecting the nitrogen pipeline and the cooling buffer tank, and a nitrogen charging valve is arranged on the pipeline connecting the nitrogen pipeline and the exhaust pipeline.
3. The closed safe coke plant storage tank waste gas recovery system as claimed in claim 2, wherein the closed storage tank is connected with the cooling buffer tank through a gas outlet pipeline, and a gas outlet valve and a gas outlet purging valve are arranged on the gas outlet pipeline, wherein the gas outlet valve is interlocked with the storage tank instrument.
4. The closed safe recovery system for the storage tank waste gas of the coke-oven plant as claimed in claim 3, wherein a cooling water coil is arranged in the cooling buffer tank, and the cooling water coil is respectively connected with the cold water inlet pipeline and the cold water outlet pipeline.
5. The coke plant storage tank offgas containment safety recovery system of claim 4 wherein the cooling buffer tank is topped with a buffer tank gauge, a bleed valve and a level gauge.
6. The closed safe coke plant storage tank waste gas recovery system as claimed in claim 5, wherein a drain valve is provided on the drain pipeline, and the level meter is interlocked with the drain valve.
7. The closed safe recovery system for the storage tank waste gas of the coke-oven plant as claimed in claim 6, wherein the exhaust pipeline is provided with an exhaust valve, an exhaust instrument, an exhaust detection valve, an oxygen content detector and an exhaust purging valve.
8. The closed safe storage tank waste gas recovery system of claim 7, wherein the oil washing pipeline is provided with an oil washing valve.
9. The closed safe recovery system for the storage tank waste gas of the coke-oven plant as claimed in claim 8, wherein a cold water inlet valve is arranged on the cold water inlet pipeline, and a cold water outlet valve is arranged on the cold water outlet pipeline.
10. The coke plant tank offgas containment safety recovery system of claim 9 wherein the number of the containment tanks is 1 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023261186.6U CN214064579U (en) | 2020-12-29 | 2020-12-29 | Closed safe recovery system of storage tank waste gas of coke-oven plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023261186.6U CN214064579U (en) | 2020-12-29 | 2020-12-29 | Closed safe recovery system of storage tank waste gas of coke-oven plant |
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| Publication Number | Publication Date |
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| CN214064579U true CN214064579U (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023261186.6U Active CN214064579U (en) | 2020-12-29 | 2020-12-29 | Closed safe recovery system of storage tank waste gas of coke-oven plant |
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| CN (1) | CN214064579U (en) |
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